package com.ly.interceptors;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import com.ly.utils.ThreadLocalUtil;
import com.ly.utils.JwtUtil;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
@Component
public class LoginInterceptor implements HandlerInterceptor{
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        // 令牌验证
        String token =  request.getHeader("Authorization");
         // 验证token
        try {


            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            String redisToken = operations.get(token);
            if(redisToken == null){
                throw new RuntimeException();
            }
            
            Map<String,Object> claims = JwtUtil.parseToken(token);
            
            ThreadLocalUtil.set(claims);
            return true;
        } catch (Exception e) {
            // TODO: handle exception
            // http响应状态码401
            response.setStatus(401);
            return false;
        }
    }

   @Override
   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
           @Nullable Exception ex) throws Exception {
       // 清空ThreadLocal中的数据
       ThreadLocalUtil.remove();
   }

}
